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Stability and properties of combined beverages and fruit concentrates
Klatová, Kamila ; Vítová, Eva (referee) ; Vespalcová, Milena (advisor)
This diploma thesis deals with the stability and basic properties of combined beverages and fruit concentrates. The theoretical part describes the production and use of fruit concentrates. Furthermore, the work deals with anthocyanic pigments and phenolic substances. The principle and instrumentation of liquid chromatography and electron paramagnetic resonance were described. In the next subchapter, the methods of determination of total anthocyanins and phenolic substances were described. The experimental part of the thesis described the determination of soluble solids, viscosity and antioxidant activity. The total content of phenolic compounds were determined by the Folin-Ciocalteua method and the total anthocyanins were determined by the pH-differential method. In the samples were determined cyanidine-3-glucoside and cyanidin-3-galactoside by liquid chromatography.
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Purification of reverse osmosis concentrate using advanced oxidation processes
Bačovská, Leona ; Lev,, Jaroslav (referee) ; Repková, Martina (advisor)
This bachelor thesis investigates the possibility of using advanced oxidation processes (AOPs) for the degradation of surfactants in laundry wastewater reverse osmosis concentrate. The theoretical part offers an up-to-date perspective on the treatment and disposal of reverse osmosis concentrate and laundry wastewater treatment, and further explains the principle of AOPs. In the experimental part, sodium dodecyl sulfate was selected as a model anionic surfactant. The degradation of sodium dodecyl sulfate was monitored in distilled water, in artificial laundry wastewater and in a real concentrate. All experiments were conducted on a semi-operational AOP unit and the following three reaction systems were used: UV/H2O2, UV/O3 and UV/H2O2/O3. The effectiveness of all three mentioned systems was demonstrated, with a degradation in sodium dodecyl sulfate concentration of 68 – 69 % in distilled water and 53 – 56 % in artificial laundry wastewater. In the real concentrate, the UV/H2O2 system was the most effective system when there was a 73 % degradation in anionic surfactants.
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Classification of concentrate from membrane processes
Vespalec, Jan ; Mergl, Václav (referee) ; Repková, Martina (advisor)
The Master’s Thesis deals with the classification of concentrate from membrane processes, specifically reverse osmosis concentrate. Membrane technology was used in two locations, namely a wastewater treatment plant location and an industrial laundry location. The reuse of water by using membrane processes requires consideration of the management of the concentrate further on. The concentrate may be concentrated to the point where it is not meeting the legally defined limits. The goal of this work is to determine whether reverse osmosis concentrate can be discharged to the surface water/sewage system and whether it is a hazardous waste or not. The conclusion of this work is that the monitored parameters occurring in the reverse osmosis concentrate are over the limits to be discharged to a surface water/sewage system but are below the limit for classification as hazardous waste.
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Stability and properties of combined beverages and fruit concentrates
Klatová, Kamila ; Vítová, Eva (referee) ; Vespalcová, Milena (advisor)
This diploma thesis deals with the stability and basic properties of combined beverages and fruit concentrates. The theoretical part describes the production and use of fruit concentrates. Furthermore, the work deals with anthocyanic pigments and phenolic substances. The principle and instrumentation of liquid chromatography and electron paramagnetic resonance were described. In the next subchapter, the methods of determination of total anthocyanins and phenolic substances were described. The experimental part of the thesis described the determination of soluble solids, viscosity and antioxidant activity. The total content of phenolic compounds were determined by the Folin-Ciocalteua method and the total anthocyanins were determined by the pH-differential method. In the samples were determined cyanidine-3-glucoside and cyanidin-3-galactoside by liquid chromatography.
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